package operation;

import book.BookList;

/**
 * @ClassDescription:
 * @JdkVersion: 1.8
 * @Author: 李白
 * @Created: 2024/8/19 21:11
 */
public interface IOPreparation {
    public abstract void work(BookList bookList);//方法默认修饰符都是public abstract
    //变量的前缀默认都是public abstract fianl
}
